From 719ed51d205389ce14ef9f4b398f1891cce1691d Mon Sep 17 00:00:00 2001 From: uhi22 Date: Fri, 26 May 2023 17:27:13 +0200 Subject: [PATCH] docu: sudo-less run on Raspberry --- doc/installation_on_raspberry.md | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/doc/installation_on_raspberry.md b/doc/installation_on_raspberry.md index d23a436..841bcd3 100644 --- a/doc/installation_on_raspberry.md +++ b/doc/installation_on_raspberry.md @@ -98,6 +98,16 @@ Open a second console window, and start here the pev in simulation mode `sudo python pyPlc.py P S`. We should see how the EVSE and PEV are talking to each other. +## Sudo-less run of pyPLC + +The access to the ethernet raw data requires sudo. To avoid this, the following setting may help: +- Find out the path of python: `which python`. This gives something like /usr/bin/python +- Find out the "real" name of the python. The above /usr/bin/python may be a link, but we need the location where it points to. +`ls -al /usr/bin | grep python`. This shows e.g. that python is a link to python3, and python3 is a link to python3.9, and this is the real file. +- Give python the permission to access the raw ethernet traffic, e.g. `sudo setcap cap_net_raw,cap_net_admin=eip /usr/bin/python3.9` +(discussed in https://github.com/SmartEVSE/SmartEVSE-3/issues/25#issuecomment-1563519025) +- When this was done, the `python pyPlc.py E` etc work without `sudo`. + ## Auto-start of the PEV software Use case: You use a RaspberryPi in the car, and want to start the charging software just by powering-up the Raspberry. @@ -138,6 +148,11 @@ the service: sudo systemctl start pev.service ``` +To stop the service: +``` + sudo systemctl stop pev.service +``` + To view the log of the service, run - `journalctl --unit=pev` or - `journalctl -f -u pev.service`